nFAPI time conversion: handle numerologies flexibly

At both the PNF and the VNF, introduce a separate numerology field, and
pass the numerology when converting time information using macros from
nfapi_interface.h. The actually numerology is still hardcoded to 1 (as it
was before), but the follow-up commits will put a suitable numerology.

In both cases, but the numerology next to the frame/slot information.

executables/nr-ue.c

@@ -290,8 +290,9 @@ static void *NRUE_phy_stub_standalone_pnf_task(void *arg)
       free_and_zero(ch_info);
     }
 
-    frame_t frame = NFAPI_SFNSLOT2SFN(sfn_slot);
-    int slot = NFAPI_SFNSLOT2SLOT(sfn_slot);
+    int mu = 1; // NR-UE emul-L1 is hardcoded to 30kHZ, see check_and_process_dci()
+    frame_t frame = NFAPI_SFNSLOTDEC2SFN(mu, sfn_slot);
+    int slot = NFAPI_SFNSLOTDEC2SLOT(mu, sfn_slot);
     if (sfn_slot == last_sfn_slot) {
       LOG_D(NR_MAC, "repeated sfn_sf = %d.%d\n",
             frame, slot);